<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>

    <style>
        .one {
            /* 加 float 之后就不是标准流了，它会浮到标准流的上面 */
            float: left;
            width: 200px;
            height: 200px;
            background-color: pink;
        }

        .two {
            width: 300px;
            height: 300px;
            background-color: purple;
        }
    </style>

<body>
    <div class="one"></div>
    <div class="two"></div>
</body>

</html>